Ubigi eSIM Review 2026: Pricing, Coverage & Verdict
Ubigi is the best travel eSIM for digital nomads and long-stay travelers. It’s a full MVNO (often delivers cleaner connection quality than resellers), offers genuine monthly subscriptions (rare in this market — $6/month for 5 GB Spain, $18/month for 20 GB South Korea), and the eSIM is reusable across 200+ destinations without reinstalling. For one-off short trips, Airalo and Nomad usually beat Ubigi on price. For monthly recurring plans or large data tiers, Ubigi is the clear pick.
Pricing Breakdown
Ubigi offers three pricing models: one-off plans (1 day to 30 days, fixed data or unlimited), monthly subscriptions (recurring monthly billing, designed for long stays), and annual plans (12-month subscriptions with monthly data allowance).
| Plan | Data | Duration | Price |
|---|---|---|---|
| Japan — 1 GB | 1 GB | 30 days | $4.00 |
| Japan — 5 GB | 5 GB | 15 days | $10.00 |
| Japan — 10 GB | 10 GB | 30 days | $16.50 |
| Japan — 25 GB | 25 GB | 30 days | $32.00 |
| Japan — Unlimited | Unlimited (FUP) | 15 days | $39.00 |
| Thailand — 10 GB | 10 GB | 30 days | $13.90 |
| Italy — 3 GB | 3 GB | 30 days | $5.00 |
| Italy — 10 GB | 10 GB | 30 days | $12.00 |
| Italy — 25 GB | 25 GB | 30 days | $19.00 |
| USA — 1 GB | 1 GB | 7 days | $4.00 |
| USA — 10 GB | 10 GB | 7 days | $12.00 |
| USA — 10 GB | 10 GB | 30 days | $14.00 |
| USA — Unlimited | Unlimited (FUP) | 1 day | $9.00 |
| South Korea — 1 GB | 1 GB | 7 days | $4.00 |
| South Korea — 10 GB | 10 GB | 30 days | $16.00 |
| South Korea — 25 GB | 25 GB | 30 days | $32.00 |
| South Korea — Monthly | 20 GB / month | Monthly recurring | $18.00 / mo |
| South Korea — Annual | 60 GB (5 GB/mo) | 12 months | $49.00 |
| Vietnam — 10 GB | 10 GB | 30 days | $12.00 |
| Vietnam — 50 GB | 50 GB | 30 days | $36.00 |
| Vietnam — Monthly | 20 GB / month | Monthly recurring | $19.00 / mo |
| Spain — 3 GB | 3 GB | 30 days | $5.00 |
| Spain — 10 GB | 10 GB | 30 days | $12.00 |
| Spain — 25 GB | 25 GB | 30 days | $19.00 |
| Spain — 50 GB | 50 GB | 30 days | $34.00 |
| Spain — Monthly | 5 GB / month | Monthly recurring | $6.00 / mo |
| Spain — Monthly | 20 GB / month | Monthly recurring | $12.00 / mo |
Ubigi’s monthly subscription plans are uncommonly cheap — $6/month for 5 GB Spain or $12/month for 20 GB Spain has no real competitor at the recurring tier. For one-off short trips at the 5 GB / 30-day mark, Nomad or Airalo typically beat Ubigi on price.
Coverage & Networks
Ubigi operates as a full MVNO (Mobile Virtual Network Operator) rather than a reseller — meaning Ubigi has direct interconnect agreements with carriers, often delivering cleaner routing and connection quality than typical travel eSIM providers. Coverage spans 200+ destinations with a single reusable eSIM.
Key networks by destination:
- South Korea: SK Telecom — Korea’s largest carrier
- Italy: Iliad / WindTre — strong urban coverage
- Spain: Orange Spain / Yoigo
- USA: Major US carriers (specific carrier varies by region)
- Japan: KDDI/au + NTT Docomo — dual-carrier with Docomo for rural areas
- Vietnam: VNPT (Vinaphone)
- Thailand: AIS / TrueMove H
Ubigi eSIMs are data-only — no voice calls or SMS over the eSIM line.
Strengths
- Monthly subscription plans — genuinely unique in this market. $6/month for 5 GB Spain, $18/month for 20 GB South Korea, $19/month for 20 GB Vietnam
- Reusable eSIM across 200+ destinations — install once, top up for any country without reinstalling
- Full MVNO infrastructure — often delivers cleaner connection quality than resellers
- Smartstart activation — plan starts when you arrive at destination, not on purchase
- Strong long-stay pricing — competitive 25 GB and 50 GB plans
- Annual plans for digital nomads (60 GB over 12 months at $49 for South Korea)
Weaknesses
- One-off short-trip pricing isn’t competitive — Airalo, Saily, and Nomad typically beat Ubigi at the 5 GB / 30-day tier
- Network info is opaque for some destinations — Ubigi doesn’t always publish which specific carrier you’ll connect to
- App required for purchase and plan management
- “Unlimited” plans include FUP — Ubigi USA unlimited throttles to 2 Mbps after 15 GB (7-day) or 25 GB (30-day)
- Less brand recognition than Airalo or Holafly — fewer user reviews and community discussion
When to Use vs. When to Avoid
If you want a monthly subscription or a long-stay plan, choose Ubigi. For a one-off short trip, Nomad or Airalo usually win on price.
Destination Guides Featuring Ubigi
Ubigi is recommended in the following destination guides:
- eSIM for South Korea: What Actually Works in 2026 — Ubigi has the cheapest 10 GB plan and best monthly subscription
- eSIM for Spain: What Actually Works in 2026 — Ubigi has the cheapest monthly subscription ($6/month for 5 GB)
- eSIM for Italy: What Actually Works in 2026 — Ubigi has the cheapest 25 GB plan
- eSIM for USA: What Actually Works in 2026 — Ubigi monthly subscription is the best long-stay option
- eSIM for Vietnam: What Actually Works in 2026 — Ubigi has the cheapest 50 GB plan
- eSIM for Japan: What Actually Works in 2026 — Ubigi connects to both Docomo and KDDI/au
Frequently Asked Questions
Is Ubigi eSIM legit?
Yes. Ubigi is a legitimate eSIM provider operated by Transatel, a French MVNO acquired by NTT (the parent of NTT Docomo) in 2019. This is unusual in the travel eSIM market — most competitors are pure resellers, while Ubigi has direct carrier infrastructure backing.
What makes Ubigi different from other travel eSIMs?
Three things: (1) Ubigi is a full MVNO, not a reseller — often cleaner connection quality. (2) Genuine monthly subscription plans designed for long-stay travelers and digital nomads — uncommon in this market. (3) The same eSIM is reusable across 200+ destinations — top up for any country without reinstalling.
Are Ubigi’s monthly plans really worth it?
For long-stay travelers, yes. $6/month for 5 GB Spain, $18/month for 20 GB South Korea, or $19/month for 20 GB Vietnam are all priced significantly below the equivalent one-off plans. For trips under 30 days, the one-off model is usually cheaper.
Are Ubigi’s “unlimited” plans really unlimited?
No. Ubigi’s unlimited plans include a Fair Usage Policy. USA unlimited throttles to 2 Mbps after 15 GB (7-day plan) or 25 GB (30-day). Italy unlimited similar. The data is technically unlimited; the high-speed allowance is capped.
Does Ubigi work with iPhone and Android?
Yes. Ubigi works with all eSIM-compatible phones, including iPhone XS and later, Samsung Galaxy S20 and newer, and Google Pixel 3a and newer. Installation is via the Ubigi app (iOS and Android).
What is Smartstart activation?
Smartstart is Ubigi’s term for “activates on arrival.” When you buy a plan, it doesn’t start counting until your phone connects to a network in the destination country. This means you can buy plans well in advance without burning days during travel time.